How can I dockerize my springboot application which has multiple datasources? - spring-boot

Question

I have a springboot application which uses a postgresql database and a mongoDB database , I have been able to correctly configure them but now when I want to dockerize my application to later deploy it on a Kubernetes cluster, I am completely clueless. Most of the youtube tutorials and articles are on how to dockerize simple springboot applications or springboot applications that use only one database, thus any input on how I can proceed to dockerize my application would be really appreciated!
Edit:
I am following this tutorial -
https://www.section.io/engineering-education/running-a-multi-container-springboot-postgresql-application-with-docker-compose/
Here in the docker-compose.yml file-
version: '3.1'
services:
API:
image: 'blog-api-docker.jar'
ports:
- "8080:8080"
depends_on:
PostgreSQL:
condition: service_healthy
environment:
- SPRING_DATASOURCE_URL=jdbc:postgresql://PostgreSQL:5432/postgres
- SPRING_DATASOURCE_USERNAME=postgres
- SPRING_DATASOURCE_PASSWORD=password
- SPRING_JPA_HIBERNATE_DDL_AUTO=update
PostgreSQL:
image: postgres
ports:
- "5432:5432"
environment:
- POSTGRES_PASSWORD=password
- POSTGRES_USER=postgres
- POSTGRES_DB=postgres
healthcheck:
test: ["CMD-SHELL", "pg_isready -U postgres"]
interval: 10s
timeout: 5s
retries: 5
Only one postgreSQL datasource is defined ,in my project with a similar postgreSQL datasource as given in the tutorial I am also using a mongoDB database which is running on atlas.
I am also including my application.properties file for your reference-
spring.ds-psql.datasource.jdbcUrl=jdbc:postgresql://localhost:5432/devicestatspsql
spring.ds-psql.datasource.username=
spring.ds-psql.datasource.password=
spring.data.mongodb.users-mongo-atlas.uri=*mongodb database url here*
spring.jpa.generate-ddl=true
spring.jpa.show-sql=true
So I just need to know what changes are required in my docker-compose.yml file to accommodate this mongodb database in the docker image

Answer 1

You can use the Kubernetes Configmap and Secret as of now to store the configuration of your application.
Configmap and Secret are mostly for storing configurations like database connection strings, usernames, and passwords.
You can create different configuration maps as per requirement for Dev,Stag and Prod then inject the specific to your deployment so the application will get those values from either .env file or from OS environment.
Here's the reference article.